Brake-drum.



(LIB. KING, C. B. WESTON. H. E. ROUSH G. HOLMES.

BRAKE DRUM.

APRLICATION FILED JAN. 1,0. 1912.

Patented Nov. 9, 1915.

` 2 SHEETS-SHEET] C. B. KING, C. B. WESTON, H. E'. ROUSH & G. HOLMES.

BRAKE DRUM.

APPLICATION FILED 1AN.10. 1912.

Patented Nov. 9, 1915.

2 SHEEfS-SHEET 2.

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nnirTEn sTas PATENT @Enron CHARLES B. KING, CLARENCE B. WESTON, AND `I-IERBER'I E.'ROUSH, 0F MARION, OHIO, AND GRANT HOLMES, O131 DANVILLE, ILLINOIS, ASSIGNORS TO THE MARION STEAM SI-IOVEL COMPANY, OF MARION, OHIO, A CORPORATION F OHIO.

BRAKE-DRUM.

Lisanne.

Specification of Letters Patent.

Parenteel Nev. a. rais.

To all IU/wm t may concern Be it known that we, CHARLES. B. KING, CLARENCEv IVEsToN, and I-IERBERT E. RoUsH, all residing at Marion, in the county '5 of Marion andState of Ohio, and GRANT Y HOLMES, residing at Danville, in the county of Vermilion and State of Illinois, citizens of the United States,I have invented certain new and useful Improvements in Brake- Drums, of which the following is a specifiy cation, reference being had therein to the accompanying drawings. A

This invention relates to brake-drums and the object of the invention is to provide an air-cooled brake-drum.

To this end it is a further object of the invention to so construct the drum that air will be caused tocirculate adjacent to or in contact with the inner side of the rim of the drum.

In the accompanying drawings, Figure l is a side elevation of a brake-drum embodying our invention; Fig. '2 is a section taken on the line c c of Fig. l; Fig. 3 is a side elevation of the brake-drum showing the invention applied thereto in a modified oim; Fig. 4 is a section taken on the line a. a of Fig. 3 and looking` in the direction of the arrows; and Fig. 5 is asection-taken on Sf the line b b of Fig. 3.

In these drawings we have illustrated several embodiments of our invention which, while differing slightly in their details of construction, embody the same essential fea- .35 tures. In each instance the drum is provided with devices which cause the air to circulate in a path adjacent to or in contact with the inner side of the rim of the drum, thus causing the rim to be subjected 40 to the cooling action of the air. In each instance the drum comprises a housing arranged on the inner side of the rim and having one or more conduits. the outer wall of which is formed by 'the rim of the drum.

These conduits are in open communication \with the air and are preferably providedl with .openings at diii'erent points to permit the ingress and egress of the air. IVhen'the drum is revolving rapidly the. air ,will be Caused to enter the conduits through one of the openings therein and to circulate within the conduit adjacent to and inV contact with i the'rim.

In Figs. l and 2,2 we have shown the in- ,2 with a cable drum 3 vention as applied to a brake-drum comprising a rim l connected by means of a web which, in turn, is mounted upon a shaft 4. Interposed be` tween. the web 2 and the rim is a housing comprising side walls 5 and a base or inner wall G. The outer wall of the housing is formed by the rim l of the drum. The

inner wall of the housing is provided on each side of the web 2 with a series of openings 7 and S connecting the interior of the housing with the atmosphere. Each opening is provided with a defiector which, in the present instance, comprises an outwardly flared lip 9. The lips on one side of the web are flared in one direction and those on the other side of the web are flared in the opposite direction. Consequently, one series of lips will be flared in the direction of rotation of the drum when the latter is rotated in either direction. The outwardly flared lips serve to provide the openings with mouths opening in the direction in which the lips are flared and through which the air is directed into' the interior of the housing. It is also desirable, though not essentially necessary, that the side walls 5 of the housing be provided with openings l0 to permit the escape of the air. IVhen the drum is rotated in one direction the lips 9 which are flared outwardly in the direction in which the drum is rotating will deflect the air` through the openings in the inner wall of the housing and cause the same to impinge against the inner side of the rim of the drum and to circulate through thehollow interior of the drum, which hollow interior constitutes a conduit for the air. The openings 10 in the side walls of the rim permit the escape of the air from the housing and prevent all compression. Obviously, the circulation of the air through the conduit in 'the housing and its contact with the inner surface of the rim will have a very marked cooling action upon the rim.

In Figs. 3, 4f and 5 of the drawings we have shown a brake-drum provided with a housing similar to that shown in Figs. l and 2 but instead of providing the housing with openings in the inner wall thereof we have formed the openings in the side walls only of the housing, as indicated at l1 and 12. The openings 11 are provided at their rear edges with lips 13, all of which are l rection, this direction ybeing opposite to tlie direction in which the lipsy 13 are flared.

In this construction the air will be deflected into the conduit within the housing -When the drum is rotated in either direction and will be caused to circulate within said conduit adjacent to and invcontact with the inner surface of the rim.

We have shown and described several forms of brake-drum embodying our invenltion but it will be understood thatthese are chosen for the Ipurpose of illustration' and that the invention is not confined' to the forms of the several devices here shown and described, nor is it confined to -brake-drums but is applicable torotaiy members of various kinds having' an annular surface subjected to friction. It will also be understood that the term circumferential lis herein employed as meaning inpa ciicumfen.

ential direction and extending either for a whole or a part o'f the circumference of the drum. Further, it will be understood that should any surface of the drum other than the outer surface of the rim thereof b e utiliized as the contact orfriction surface and the air conduit arranged' adjacent to the opposite surface, such a COnStriIctiOm-and' arrangement would be the full e\qiivalent of that herein shown and describled iii which the outer'surface is the" Contact surface and the inner surface is the one acted upon by the air currents.

Having thus fully described our invention, what we claim as new and desire to secure by Letters Patent, is

1. A rotatable drum comprising a rim having a contact surface, and an inner surface, said druni also having an air conduit adjacent to the inner surface of said rim',

extending in a circumferential direction and provided-'in one wall with an inlet and in another wall with an outlet..

2. A rotatable drum comprising a rim face, said drum also having an air conduit,

one Wall ofwliichis formedv by the inner surface of saidtffrim, said lconduit extending in a circumferential direction-and having an inlet opening in that wall opposite the filmer surfaceof said rim, and a forwardly extending detlectorto deflect the air through said inlet opening, into engagement with andv circumferentially along 'the inner sur face of said rim.

4. A rotatable drum comprising a rim having a contact surface and an inner surface, said drumhaving an air conduitextending along the innersurface of said rim and in a circumferential direction, said conduit having two series of openings, the openings of one series having' their mouths directed-in' one direction of rotation of said drum and the openings ofthe other series havingtheir mouths directed in the other direction of rotation of said drum.

5. A rotatable drinn comprising a rim having a contact surface and an inner surface, said drum having anf'air conduit eX- tending along theinner surface of said rim and in a circumferentialdirection, said conduit havingtWo-"ieries of'openings, one on each side of the center thereof, the openingsof one series having their mouths di- `rected 1n one direction of rotation of said drum and the openings of the other series having' their mouths directed in the other direction of rotation of said drum.

, 6. A rotatable drum comprising a housing extending'entirely about'the circumference of said drum, the outer wall of said housing being formed by the rim of the drum and the inner Wall of 'said housing having two circumferential series of openings, the, openings ofone series having lips flared in one direction, the openings of the other series having lips flared in the opposite direction, and the Walls of the housing 9o hollow having other openings between said inner wall and said rim. I

In testimony whereof we .atlix our signa'- tures in the presence of two Witnesses.

-CHARLES B. KING. CLARENCE B. 'WESTONl HERBERT E. ROUSH.- y GRANT HOLMES. Witnesses to the signatures of C. B. King, C. B. Weston, and H. E. Roush:

H, H. CONNOLLY, R.V H. Rossum.

Holmes:

FRED B. PENWELL, GERTRUDE C. KOCH.

Witnesses 'to the signature of Grant 

